# Halcyon Calc Lite vs Intelligent Sink Trap

The clearest difference is in-app purchases: Intelligent Sink Trap at none against Halcyon Calc Lite's 3. Intelligent Sink Trap also leads on ads (none vs shown) and iOS requirement (12.1 vs 16.6). Halcyon Calc Lite's advantage is update cadence (every 3 months vs every 22 months). On price and device support there is nothing between them.

Both are free to download. Halcyon Calc Lite sells 3 one-off in-app purchases. Intelligent Sink Trap asks for nothing beyond the download.

Halcyon Calc Lite ships an update every 3 months, Intelligent Sink Trap every 22 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Halcyon Calc Lite | Intelligent Sink Trap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (15 ratings)](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 22 months |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 10 MB |
| Requires iOS | 16.6 | **12.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Touch Software](https://appshunter.io/developer/327064662) | [5011936 ONTARIO Inc.](https://appshunter.io/developer/1461926441) |

## What reviewers say

### Halcyon Calc Lite

[App page](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888)

This app is a powerful calculator for students and professionals, offering advanced features like symbolic expression manipulation, graphing, and statistical analysis. It supports real, complex, and integer numbers, matrices, and vectors, making it versatile for various mathematical tasks.

**Highlights:** Symbolic expression manipulation, Graphing of expressions, Matrix and vector calculations, Statistical analysis, Multiple number formats (decimal, hex, octal, binary), Over 225 built-in operations

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Directory And Unit Conversion Support | $0.99 | one-time |
| Programming Support | $1.99 | one-time |
| Larger Display Upgrade | $1.99 | one-time |


### Intelligent Sink Trap

[App page](https://appshunter.io/ios/app/intelligent-sink-trap/id1462017519)

**In-app purchases:** none


## Frequently asked questions

### Is Halcyon Calc Lite free?

Halcyon Calc Lite is free to download, with in-app purchases available.

### Is Intelligent Sink Trap free?

Intelligent Sink Trap is free to download, with no in-app purchases.

### Do Halcyon Calc Lite or Intelligent Sink Trap have ads?

Halcyon Calc Lite shows ads; Intelligent Sink Trap does not.

### Which is updated more often, Halcyon Calc Lite or Intelligent Sink Trap?

Halcyon Calc Lite ships an update every 3 months, and Intelligent Sink Trap every 22 months. Most recently, Halcyon Calc Lite was updated on October 29, 2026 and Intelligent Sink Trap on October 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*